1 /* $OpenBSD: pem_pkey.c,v 1.20 2015/02/11 03:19:37 doug Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 #include <string.h> 61 62 #include <openssl/opensslconf.h> 63 64 #include <openssl/buffer.h> 65 #include <openssl/err.h> 66 #include <openssl/evp.h> 67 #include <openssl/objects.h> 68 #include <openssl/pem.h> 69 #include <openssl/pkcs12.h> 70 #include <openssl/x509.h> 71 72 #ifndef OPENSSL_NO_ENGINE 73 #include <openssl/engine.h> 74 #endif 75 76 #include "asn1_locl.h" 77 78 int pem_check_suffix(const char *pem_str, const char *suffix); 79 80 EVP_PKEY * 81 PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u) 82 { 83 char *nm = NULL; 84 const unsigned char *p = NULL; 85 unsigned char *data = NULL; 86 long len; 87 int slen; 88 EVP_PKEY *ret = NULL; 89 90 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, 91 bp, cb, u)) 92 return NULL; 93 p = data; 94 95 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) { 96 PKCS8_PRIV_KEY_INFO *p8inf; 97 p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len); 98 if (!p8inf) 99 goto p8err; 100 ret = EVP_PKCS82PKEY(p8inf); 101 if (x) { 102 EVP_PKEY_free(*x); 103 *x = ret; 104 } 105 PKCS8_PRIV_KEY_INFO_free(p8inf); 106 } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) { 107 PKCS8_PRIV_KEY_INFO *p8inf; 108 X509_SIG *p8; 109 int klen; 110 char psbuf[PEM_BUFSIZE]; 111 p8 = d2i_X509_SIG(NULL, &p, len); 112 if (!p8) 113 goto p8err; 114 if (cb) 115 klen = cb(psbuf, PEM_BUFSIZE, 0, u); 116 else 117 klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u); 118 if (klen <= 0) { 119 PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, 120 PEM_R_BAD_PASSWORD_READ); 121 X509_SIG_free(p8); 122 goto err; 123 } 124 p8inf = PKCS8_decrypt(p8, psbuf, klen); 125 X509_SIG_free(p8); 126 if (!p8inf) 127 goto p8err; 128 ret = EVP_PKCS82PKEY(p8inf); 129 if (x) { 130 EVP_PKEY_free(*x); 131 *x = ret; 132 } 133 PKCS8_PRIV_KEY_INFO_free(p8inf); 134 } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) { 135 const EVP_PKEY_ASN1_METHOD *ameth; 136 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); 137 if (!ameth || !ameth->old_priv_decode) 138 goto p8err; 139 ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len); 140 } 141 142 p8err: 143 if (ret == NULL) 144 PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB); 145 err: 146 free(nm); 147 explicit_bzero(data, len); 148 free(data); 149 return (ret); 150 } 151 152 int 153 PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc, 154 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 155 { 156 char pem_str[80]; 157 158 if (!x->ameth || x->ameth->priv_encode) 159 return PEM_write_bio_PKCS8PrivateKey(bp, x, enc, 160 (char *)kstr, klen, cb, u); 161 162 (void) snprintf(pem_str, sizeof(pem_str), "%s PRIVATE KEY", 163 x->ameth->pem_str); 164 return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey, 165 pem_str, bp, x, enc, kstr, klen, cb, u); 166 } 167 168 EVP_PKEY * 169 PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x) 170 { 171 char *nm = NULL; 172 const unsigned char *p = NULL; 173 unsigned char *data = NULL; 174 long len; 175 int slen; 176 EVP_PKEY *ret = NULL; 177 178 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS, 179 bp, 0, NULL)) 180 return NULL; 181 p = data; 182 183 if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) { 184 ret = EVP_PKEY_new(); 185 if (!ret) 186 goto err; 187 if (!EVP_PKEY_set_type_str(ret, nm, slen) || 188 !ret->ameth->param_decode || 189 !ret->ameth->param_decode(ret, &p, len)) { 190 EVP_PKEY_free(ret); 191 ret = NULL; 192 goto err; 193 } 194 if (x) { 195 EVP_PKEY_free(*x); 196 *x = ret; 197 } 198 } 199 200 err: 201 if (ret == NULL) 202 PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB); 203 free(nm); 204 free(data); 205 return (ret); 206 } 207 208 int 209 PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x) 210 { 211 char pem_str[80]; 212 213 if (!x->ameth || !x->ameth->param_encode) 214 return 0; 215 216 (void) snprintf(pem_str, sizeof(pem_str), "%s PARAMETERS", 217 x->ameth->pem_str); 218 return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode, 219 pem_str, bp, x, NULL, NULL, 0, 0, NULL); 220 } 221 222 EVP_PKEY * 223 PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u) 224 { 225 BIO *b; 226 EVP_PKEY *ret; 227 228 if ((b = BIO_new(BIO_s_file())) == NULL) { 229 PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB); 230 return (0); 231 } 232 BIO_set_fp(b, fp, BIO_NOCLOSE); 233 ret = PEM_read_bio_PrivateKey(b, x, cb, u); 234 BIO_free(b); 235 return (ret); 236 } 237 238 int 239 PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc, 240 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 241 { 242 BIO *b; 243 int ret; 244 245 if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) { 246 PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB); 247 return 0; 248 } 249 ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u); 250 BIO_free(b); 251 return ret; 252 } 253 254